A Ti-doped γ-Fe2O3/SDS nano-photocatalyst as an efficient adsorbent for removal of methylene blue from aqueous solutions.
Synthetic dyes are among the most important environmental pollutants in wastewaters. Consequently, elimination of the synthetic dyes from wastewaters using non-toxic materials and eco-friendly technologies has been of considerable interests. In this study, magnetically separable Ti-doped γ-Fe 2 O 3...
| Published in: | Journal of Environmental Management Vol. 213; pp. 56 - 66 |
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| Main Authors: | , |
| Format: | Article |
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Academic Press Inc.
May2018
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| Subjects: | |
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=128416110&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 128416110 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: May2018 vid: 213 pid: 735 pub: Academic Press Inc. artinfo: ui: 128416110 10.1016/j.jenvman.2018.02.035 ppf: 56 ppct: 10 formats: tig: atl: A Ti-doped γ-Fe2O3/SDS nano-photocatalyst as an efficient adsorbent for removal of methylene blue from aqueous solutions. aug: au: Mirbagheri, Naghmeh Sadat Sabbaghi, Samad affil: Nanochemical Engineering Department, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran su: Doping agents (Chemistry) Photocatalysts Methylene blue Analytical chemistry Aqueous solutions Thiazine dyes sug: subj: Doping agents (Chemistry) Photocatalysts Methylene blue Analytical chemistry Aqueous solutions Thiazine dyes keyword: γ-Fe 2 O 3 Adsorptive removal Photocatalytic degradation Surface modification Wastewater treatment γ-Fe 2 O 3 Adsorptive removal Photocatalytic degradation Surface modification Wastewater treatment ab: Synthetic dyes are among the most important environmental pollutants in wastewaters. Consequently, elimination of the synthetic dyes from wastewaters using non-toxic materials and eco-friendly technologies has been of considerable interests. In this study, magnetically separable Ti-doped γ-Fe 2 O 3 photocatalysts were synthesized for the removal of methylene blue (MB) from a dye-contaminated aqueous solution (as a model of dye-polluted wastewaters). Compared to the pristine γ-Fe 2 O 3 , the 1.78 v% Ti-doped γ-Fe 2 O 3 significantly increased the adsorption of MB by 57% in the dark condition as a result of the improved BET surface area in this photocatalyst. Moreover, the contact time required for the photocatalytic degradation of MB by the 1.78 v% Ti-doped γ-Fe 2 O 3 decreased due to the higher concentration of charge carriers in this photocatalyst than that of the pristine γ-Fe 2 O 3 . The effect of different experimental parameters on the adsorption property and photocatalytic activity of the 1.78 v% Ti-doped γ-Fe 2 O 3 photocatalyst showed that the solution pH had a remarkable influence on the removal performance of this photocatalyst. Surface treatment of the 1.78 v% Ti-doped γ-Fe 2 O 3 with sodium dodecyl sulfate (SDS) resulted in the formation of a negatively charged Ti-doped γ-Fe 2 O 3 /SDS photocatalyst, which showed a higher tendency for the adsorption and removal of MB than the untreated photocatalyst. Moreover, the MB removal efficiency of this photocatalyst was among the best performances that have been reported for the γ-Fe 2 O 3 -based photocatalysts. The synthesized photocatalysts were characterized by various techniques, and a plausible mechanism for the removal of MB from aqueous solutions by the Ti-doped γ-Fe 2 O 3 /SDS photocatalyst was purposed. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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